Preparation method of polyester chip capable of resisting odor-causing bacteria

Abstract

The preparation method is characterized by comprising the following steps: mixing ethylene glycol and zinc white according to the weight ratio of (3-100): 1, and grinding until the solid particle size in the material is 80-110 nm to obtain nano zinc white dispersion liquid; 20-25 parts by weight of terephthalic acid, 25-30 parts by weight of ethylene glycol and 1-5 parts by weight of nano zinc white dispersion liquid are put into a reaction kettle and heated for an esterification reaction, 1-3 parts by weight of a catalyst and 1-2 parts by weight of a stabilizer are added after the esterification reaction is finished, heating is carried out for a vacuum polycondensation reaction, after the reaction is finished, materials after the reaction are cooled and granulated, and the nano zinc white dispersion liquid is obtained. And preparing the polyester chip capable of resisting odor-causing bacteria. The anti-odorizing bacteria polyester chip and the textile thereof prepared by the invention can inhibit the activity of the anti-odorizing bacteria from the source to achieve the deodorization effect, are particularly suitable for manufacturing textiles including socks, insoles, underwear and the like, have good anti-odorizing bacteria performance and can pass safety class A detection.

Description

Technical Field

[0001] The present invention belongs to the preparation of polyester chips, and relates to a method for preparing anti-odor-causing bacteria polyester chips. The anti-odor-causing bacteria polyester chips prepared by the present invention are particularly suitable for making textiles, including socks, insoles, underwear and other clothing or other textiles, which not only have good anti-odor-causing bacteria performance but also can pass safety category A detection. Background Art

[0002] The odor produced by textiles after use is an old problem that troubles consumers. With the continuous improvement of economy and quality of life, people have put forward requirements for human protection and health care functions in addition to the inherent characteristics of natural fibers for civil textiles, which has prompted synthetic fibers to move from differentiation to functionalization and health care. However, many daily necessities contain a large number of microorganisms, and a variety of pathogenic microorganisms are contaminated or bred on the products we touch every day. There are countless bacteria on human skin. These bacteria are transferred to clothes with sweat and sweat stains, and can multiply within a few hours, decomposing the oil and dandruff secretions on the surface of the human body, producing disgusting odors, which constantly affect consumers' experience and threaten consumers' health. Far East Zhengda Laboratory successfully discovered and extracted 25 key bacterial species that cause textiles to odor, and based on this, established the world's first detection and evaluation method for evaluating the anti-odor bacteria performance of textiles. This evaluation method fills the gap in the detection of anti-odor bacteria species and opens up a new direction for the development of antibacterial textile technology.

[0003] In the prior art, the deodorization methods of textiles mainly include physical adsorption, chemical deodorization, sensory deodorization and biological deodorization. Physical deodorization mainly utilizes the adsorption between odor molecules and fiber molecular groups or other substance molecular groups loaded on the fiber, and absorbs odor chemical components through porous materials, thereby reducing the concentration of odor substances in the air. This method is simple to operate, but the deodorization effect may gradually weaken over time and washing; chemical deodorization is to decompose and remove odor chemical components through redox reactions, addition or condensation reactions, or to remove acidic and alkaline odors through neutralization reactions or ion exchange reactions. This method uses deodorizing finishing agents to attach to the surface of the fabric through certain finishing methods, and achieves the purpose of eliminating odors through chemical reactions with odor molecules, but the effect is not long-lasting and there are certain safety risks; sensory deodorization uses masking or offsetting effects to cover and offset odors with strong odors or other chemical odors; biological deodorization uses biological enzymes to decompose organic odorous substances. This method is environmentally friendly and safe, but the activity and durability of the enzymes need to be strictly controlled. Therefore, making the raw materials have long-term anti-odor properties while taking safety into consideration has become a difficult but challenging issue.

[0004] In the prior art, commercially available products mainly eliminate textile odors by adding masterbatch to spinning and finishing textiles. Materials that resist odor-causing bacteria from the root are not yet mature and cannot meet market demand. CN221137138U discloses "a deodorizing and perspiration-wicking knitted polyester-cotton fabric". Its technical solution is to coat the upper surface of the fabric layer with a deodorizing coating. The disadvantage is that the deodorizing effect will gradually weaken over time and washing, and this technical solution does not involve the safety category level, so there is uncertainty in its use. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a method for preparing an anti-odor-causing bacteria polyester slice, thereby providing a method for preparing an anti-odor-causing bacteria polyester slice that can inhibit the activity of anti-odor-causing bacteria from the root to achieve a deodorizing effect and effectively improve the quality of textile raw materials.

[0006] The present invention is to provide a method for preparing polyester chips resistant to odor-causing bacteria, which is characterized by the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 3 to 100:1, add them into a (three-roller) grinder, mix and grind until the solid particle size in the mixture is 80 to 110 nm (the particle size can be detected every 1 to 2 hours using a nanometer particle size detector), and obtain a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 20-25 parts by weight of terephthalic acid, 25-30 parts by weight of ethylene glycol and 1-5 parts by weight of the nano zinc white dispersion prepared in step a, put the terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, and separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation through the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% or more of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 1 to 3 parts by weight of a catalyst and 1 to 2 parts by weight of a stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the positive pressure of the reactor, cool the reacted material and cut it into pellets (i.e., slices), thus obtaining anti-odor bacteria polyester slices.

[0007] In the present invention, the grinding temperature in step a is 50-70° C. and the grinding time is 24-48 hours.

[0008] In the present invention, the temperature of the esterification reaction in step b is 240-260°C.

[0009] In the present invention, the reaction temperature of the vacuum polycondensation reaction in step d is 260-280° C., the pressure is 10-100 Pa, and the reaction time (after reaching high vacuum, i.e., reaching a pressure of 10-100 Pa) is 1-1.5 h.

[0010] In the content of the present invention: the stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer.

[0011] In the present invention: the catalyst in step c is antimony trioxide or antimony acetate.

[0012] The melting point of the anti-odor-causing bacteria polyester slices obtained in step d is 255-260° C. After the anti-odor-causing bacteria polyester slices are prepared into textiles, they are evaluated according to the T / CNGA 58-2024 "Testing and Evaluation of Anti-Odor-Causing Bacteria Performance of Textiles" standard and meet the first-level anti-odor-causing bacteria index.

[0013] Compared with the prior art, the present invention has the following characteristics and beneficial effects: (1) The anti-odor-causing bacteria mechanism of the anti-odor-causing bacteria polyester slice prepared by the present invention is: by selecting materials and designing structures, the bandgap width is narrowed to form an electron-rich semiconductor, which can form negatively charged electrons and positively charged holes by receiving very little energy. Such holes react with oxygen and water to generate, and react with hydroxyl groups in various microorganisms to destroy the proliferation ability of bacteria and fungi, thereby achieving the purpose of resisting odor-causing bacteria; by using the present invention, zinc white is processed into a nano zinc white dispersion, and the reaction monomer is filled into the interlayer of the nano layered material by an in-situ polymerization method, so that a polymerization reaction occurs between the layers, and the polyester material has both long The material has effective stabilizing function and excellent processing performance. The material inhibits the generation of odor from the source by inhibiting the reproduction of odor-causing bacteria. Different from the post-finished materials in the commercially available products in the prior art, the anti-odor-causing bacteria polyester slice material prepared by the present invention is more durable, stable and safe; different from the material with added masterbatch, the anti-odor-causing bacteria polyester slice material prepared by the present invention is more uniform and has good processing performance; different from chemical odor masking, the anti-odor-causing bacteria polyester slice material prepared by the present invention is a principle of inhibiting from the source; the textiles made of the anti-odor-causing bacteria polyester slice prepared by the present invention can pass T / CNGA 58-2024 "Detection and Evaluation of Anti-Odor-Causing Bacteria Performance of Textiles" and reach the first-level index of anti-odor-causing bacteria grade: excellent anti-odor-causing bacteria performance, and the finished product is identified as safety category A by China's national mandatory standard GB18401-2010 "National Basic Safety Technical Specifications for Textile Products"; (2) The preparation process of the product of the present invention is simple. The prepared anti-odor-causing bacteria polyester chips and textiles thereof can inhibit the activity of anti-odor-causing bacteria from the root to achieve a deodorizing effect and improve the quality of textiles. The prepared anti-odor-causing bacteria polyester chips are particularly suitable for making textiles, including socks, insoles, underwear and other clothing or other textiles. They not only maintain good anti-odor-causing bacteria performance but also can pass the safety category A test, and are highly practical. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below, so that those skilled in the art can better understand the advantages and features of the present invention, and thus make a clearer definition of the protection scope of the present invention. The embodiments described in the present invention are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0015] In the following examples, the specific unit of "parts by weight" is "kilogram (kg)" Embodiment 1: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 3:1 and add them to a three-roll mill for mixing and grinding. Use a nanometer particle size detector to measure the particle size every 2 hours. Grind until the solid particle size in the mixture is 110 nm, and obtain a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 20 parts by weight of terephthalic acid, 25 parts by weight of ethylene glycol and 1 part by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat them under normal pressure to carry out esterification reaction, and separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation in the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 1 part by weight of a catalyst and 1 part by weight of a stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is 60°C; The temperature of the esterification reaction in step b is 240°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 260° C., a pressure of 20 Pa and a reaction time of 1 h. The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony trioxide.

[0016] After testing, the melting point of the anti-odor bacteria polyester slice obtained in this embodiment is 256°C and the intrinsic viscosity is 0.59 dl / g. After spinning into short fibers, the textiles are tested for the first level of anti-odor bacteria: excellent anti-odor bacteria performance and safety category A. The method is to use T / CNGA 58-2024 "Testing and Evaluation of Anti-Odor Bacteria Performance of Textiles" and GB18401-2010 "National Basic Safety Technical Specifications for Textile Products" for evaluation.

[0017] Embodiment 2: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 50:1 and add them to a three-roll mill for mixing and grinding. Use a nanometer particle size detector to measure the particle size every 2 hours. Grind until the solid particle size in the mixture is 100 nm, and obtain a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 20 parts by weight of terephthalic acid, 25 parts by weight of ethylene glycol and 5 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, and separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated from the system after condensation by the process tower, and the weight of the water separated from the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and then 2 parts by weight of catalyst and 2 parts by weight of stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is 50°C; The temperature of the esterification reaction in step b is 240°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 265° C., a pressure of 20 Pa and a reaction time of 1.5 h; The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony acetate.

[0018] After testing, the melting point of the anti-odor bacteria polyester slice obtained in this embodiment is 254°C and the intrinsic viscosity is 0.60 dl / g. After spinning into short fibers, the textiles are tested for the first level of anti-odor bacteria: excellent anti-odor bacteria performance and safety category A. The method is to use T / CNGA 58-2024 "Testing and Evaluation of Anti-Odor Bacteria Performance of Textiles" and GB18401-2010 "National Basic Safety Technical Specifications for Textile Products" for evaluation.

[0019] Embodiment 3: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 100:1 and add them to a (three-roller) grinder for mixing and grinding. Use a nanometer particle size detector to measure the particle size every 2 hours. Grind until the solid particle size in the mixture is 80nm, and obtain a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 25 parts by weight of terephthalic acid, 30 parts by weight of ethylene glycol and 5 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation by the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 1 part by weight of a catalyst and 2 parts by weight of a stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is 70°C; The temperature of the esterification reaction in step b is 240°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 260° C., a pressure of 20 Pa and a reaction time of 1 h. The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony trioxide.

[0020] After testing, the melting point of the anti-odor bacteria polyester chips obtained in this embodiment is 252°C, the intrinsic viscosity is 0.61dl / g, and the textiles made after spinning into short fibers are tested to meet the first-level anti-odor bacteria index: excellent anti-odor bacteria performance and safety category A, and the method is to use T / CNGA 58-2024 "Testing and Evaluation of Anti-Odor Bacteria Performance of Textiles" and GB18401-2010 "National Basic Safety Technical Specifications for Textile Products" for evaluation.

[0021] Embodiment 4: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 10:1 and add them to a (three-roller) grinder for mixing and grinding until the solid particle size in the mixture is 90 nm (the particle size is measured every 1 hour using a nanometer particle size detector), thus obtaining a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 21 parts by weight of terephthalic acid, 26 parts by weight of ethylene glycol and 2 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation by the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 1 part by weight of a catalyst and 1 part by weight of a stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is one of 50-70°C; The temperature of the esterification reaction in step b is 250°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 265° C., a pressure of 10 Pa and a reaction time of 1 h; The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony trioxide.

[0022] Embodiment 5: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 30:1 and add them to a (three-roller) grinder for mixing and grinding until the solid particle size in the mixture is 85 nm (the particle size is measured every 2 hours using a nanometer particle size detector), thus obtaining a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 22 parts by weight of terephthalic acid, 27 parts by weight of ethylene glycol and 3 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation by the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 3 parts by weight of catalyst and 1 part by weight of stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is one of 50-70°C; The temperature of the esterification reaction in step b is 260°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 280° C., a pressure of 40 Pa and a reaction time of 1 h. The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony trioxide.

[0023] Embodiment 6: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 60:1 and add them to a (three-roller) grinder for mixing and grinding until the solid particle size in the mixture is 110 nm (the particle size is measured every 1.5 hours using a nanometer particle size detector), and obtain a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 23 parts by weight of terephthalic acid, 27 parts by weight of ethylene glycol and 4 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated out of the system after condensation by the process tower, and the weight of the water separated out of the system is recorded); c. When the weight of the water separated in step b reaches 95% of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and then 2 parts by weight of catalyst and 1 part by weight of stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is one of 50-70°C; The temperature of the esterification reaction in step b is 250°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 270° C., a pressure of 100 Pa, and a reaction time of 1.5 h; The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony acetate.

[0024] Embodiment 7: A method for preparing an anti-odor-causing bacteria polyester chip, comprising the following steps: a. Take ethylene glycol and zinc white in a weight ratio of 80:1 and add them to a (three-roller) grinder for mixing and grinding until the solid particle size in the mixture is 100 nm (the particle size is measured every 2 hours using a nanometer particle size detector), thus obtaining a nano zinc white dispersion; b. Take the raw materials of each component according to the ratio of 24 parts by weight of terephthalic acid, 28 parts by weight of ethylene glycol and 3.5 parts by weight of the nano zinc white dispersion prepared in step a, put terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reactor, heat under normal pressure to carry out esterification reaction, and separate the water generated in the reaction system during the esterification reaction (the water generated by the reaction evaporates and rises to the process tower, is separated from the system after condensation by the process tower, and the weight of the water separated from the system is recorded); c. When the weight of the water separated in step b reaches 95% or more of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 3 parts by weight of catalyst and 2 parts by weight of stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the reactor to positive pressure, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips; The grinding temperature in step a is one of 50-70°C; The temperature of the esterification reaction in step b is 250°C; The vacuum polycondensation reaction in step d is carried out at a temperature of 280°C, a pressure of 70 Pa and a reaction time of 1.2 h; The stabilizer in step c is trimethyl phosphate, a phosphoric acid polyester stabilizer; The catalyst in step c is antimony acetate.

[0025] In the above embodiments: the percentages used, unless otherwise specified, are all weight (mass) percentages or percentages known to those skilled in the art; the proportions used, unless otherwise specified, are all weight (mass) proportions; and the weights may be in grams or kilograms.

[0026] In the above embodiments, the process parameters (temperature, time, pressure, etc.) in each step and the numerical values ​​of the amounts of each component are ranges, and any point can be applied.

[0027] The technical contents not specifically described in the present invention and the above embodiments are the same as the prior art, and the raw materials are all commercially available products.

[0028] The present invention is not limited to the above embodiments, and all of the contents of the present invention can be implemented and have the above good effects.

Claims

1. A method for preparing an anti-odor-causing bacteria polyester chip, characterized in that the steps are: a. Add ethylene glycol and zinc white in a grinder at a weight ratio of 3 to 100:1, mix and grind until the solid particle size of the mixture is 80 to 110 nm, and obtain a nano zinc white dispersion; b. Taking the raw materials of various components according to the ratio of 20-25 parts by weight of terephthalic acid, 25-30 parts by weight of ethylene glycol and 1-5 parts by weight of the nano zinc white dispersion prepared in step a, putting the terephthalic acid, ethylene glycol and the nano zinc white dispersion prepared in step a into a reaction kettle, heating under normal pressure to carry out esterification reaction, and separating the water generated in the reaction system during the esterification reaction; c. When the weight of the water separated in step b reaches 95% or more of the theoretical amount of water generated by the esterification reaction, the esterification reaction is considered to be completed, and 1 to 3 parts by weight of a catalyst and 1 to 2 parts by weight of a stabilizer are added; d. Continue heating to carry out vacuum polycondensation reaction. When the reaction time reaches the set time, cut off the connection between the reactor and the vacuum system, add nitrogen to the positive pressure of the reactor, cool and pelletize the reacted material, and obtain anti-odor bacteria polyester chips.

2. The method for preparing the anti-odor-causing bacteria polyester chips according to claim 1, characterized in that: The grinding temperature in step a is 50-70° C. and the grinding time is 24-48 hours.

3. The method for preparing the anti-odor-causing bacteria polyester chips according to claim 1, characterized in that: The temperature of the esterification reaction in step b is 240-260°C.

4. The method for preparing the anti-odor-causing bacteria polyester chips according to claim 1, characterized in that: The reaction temperature of the vacuum polycondensation reaction in step d is 260-280° C., the pressure is 10-100 Pa, and the reaction time is 1-1.5 h.

5. The method for preparing the anti-odor-causing bacteria polyester chips according to claim 1, characterized in that: The stabilizer in step c is trimethyl phosphate, a phosphoric acid-based polyester stabilizer.

6. The method for preparing the anti-odor-causing bacteria polyester chips according to claim 1, characterized in that: The catalyst in step c is antimony trioxide or antimony acetate.